8. Boshoff, A.F., Landman, M. & Kerley, G.I.H. 2016. Filling the gaps on the maps: historical distribution patterns of some of the larger mammals in part of southern Africa. Transactions of the Royal Society of South Africa. 1. 71: 23-87. http://dx.doi.org/10.1080/0035919X.2015.1084066.

9. Monsarrat, S. & Kerley, G.I.H. 2018. Charismatic species of the past: biases in reporting of large mammals in historical written sources. Biological Conservation 223:68-75. https://doi.org/10.1016/j.biocon.2018.04.036.